Table 2.

Mean age at diagnosis

Diagnosis	Number of patients	Mean age at diagnosis	Range (years)
Childhood autism	6	3.13	2.75 – 3.50
Asperger's syndrome	3	7.22	5.75 – 9.25
Autistic spectrum disorder	12	5.37	3.33 – 9.42

Table 2 shows the mean age at diagnosis and the range of age at which the diagnosis was made according to diagnostic subgroups.